AR-810 (serv.man14). Process section - Sharp Copying Equipment Service Manual (repair manual). Page 3

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AR-651/810  PROCESS SECTION  10 - 3
10. 3.  Charger Wire Cleaner Operational Circuit
(1) Role of the charger wire cleaner circuit
This circuit is for cleaning the main charger wire. It reciprocates the wire cleaner regularly to avoid
a poor charging and irregularities of the drum.
(2) Configuration of the charger wire cleaning circuit
• Wire cleaner drive motor
: Driving of the wire cleaner
• Wire cleaner stop position switch : Detection of the wire cleaner reaching the limit (rear side)
• Control section
: Controlling of the cleaner drive unit and cleaning of the wire
[Front side]
[Rear side]
Drive unit control signal
IC9
IC56
IC58
PWA-F-LGC-340/341/342
CLMTA-0
CLMTB-0
MCLSW-0
Signal
Status
CLMTA-0
CLMTB-0
Wire cleaner
“L” level
“L” level
OFF
drive motor
“H” level
“L” level
Reverse rotation (Home position 
 limit)
“L” level
“H” level
Forward rotation (Limit 
 
Home position)
“H” level
“H” level
Brake
Signal
Status
“H” level
“L” level
MCLSW-0 (Stop position switch)
Not detected
Detected
Wire cleaner
 drive motor
Wire cleaner
Main charger wire
Wire cleaner
stop position
switch
Control section
Motor
driver
Gate
array
Main
CPU
Stop position switch input signal
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